Update git submodules

Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Workaround for Tacker in HA scenarios

    JIRA: -

    For Tacker service in HA mode, it only generates VIM fernet key on
    one of the Tacker hosts. This may cause error when a request is
    been routed to another host. We need to use Barbican and Mistral
    components. But now OSA did not support Mistral yet. So we add
    a workaround here to get over this issue.

    Change-Id: I9aa228ec2ac7011cedb1eb503611ca24c7666caa
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>